Limestone Coast Local Health Network has provided a Limestone Coast community COVID-19 update on Thursday.
Board chair Grant King said a new set of travel restrictions that further restrict travel across the South Australian and Victorian border were introduced on Wednesday.
Only people classified as essential travellers or cross-border community members can now enter South Australia from Victoria.
Mr King also said new testing arrangements have also been implemented.
"New testing arrangements are also in place, and people in those groups are required to show proof of a COVID-19 test being undertaken or a test result in the last seven days," Mr King said.
"People in those groups are not required to quarantine on arrival in South Australia unless they are showing symptoms of COVID-19."
People living in cross-border communities are now only allowed to travel within 40 kilometres of the Victorian/South Australian border.
Mr King said the latest set of restrictions has resulted in an increased demand for COVID-19 testing across South East sites.
Mount Gambier Hospital's testing site is open from Monday to Friday (8:00am to 4:00pm), Saturday and Sunday (11.00am to 3:00pm).
Naracoorte Hospital's site is open from seven days a week from 9:00am to 5:00pm, while Millicent Hospital's drive-through collection centre is managed through phone and carpark assessment.
Bordertown's site, which is located at the border, is also open seven days a week from 8:00am to 4:00pm.
Mr King stated the Limestone Coast Local Health Network Incident Management Team has also continued operating, even as South Australia more broadly successfully managed to flatten the curve.
"Our continued vigilance means we are well placed to respond to the changing restrictions while continuing to provide our community the care it deserves," Mr King said.
While border restrictions are in place to reduce the risk of a second wave, many who live in cross-border communities feel as much a part of the Limestone Coast community as anyone.
"They work here, their children go to school here, they play sport here and they shop here," Mr King said.
"Indeed, many receive healthcare within South Australia, and as a health network we will continue to support these people as best we can in line with the restrictions as they continue to evolve.
"This is a challenging time for many of those within our community who are now separated by a hard border closure."
The Limestone Coast region has always had a strong, longstanding relationship with Western Districts communities.
Mr King said now more than ever, residents need to reflect on the relationships with those communities and stay strong and supportive.
"This is not a time to make accusations or lay blame. We need to tackle the challenges presented by COVID-19 as a determined and responsible cross border community," Mr King said.
"With so much focus on the COVID-19 pandemic, I remind our community that you must not ignore or put on hold your existing healthcare needs, testing and treatment plans.
"It is equally important for all of us to maintain well-being and to continue to visit your GP clinic when needed."